YOU SAID:
I have the wobbly knee sickness
INTO JAPANESE
ひざがぐらぐらしている
BACK INTO ENGLISH
My knees are shaky
INTO JAPANESE
膝が震える
BACK INTO ENGLISH
Knees tremble
INTO JAPANESE
ひざが震える
BACK INTO ENGLISH
Knees tremble
That didn't even make that much sense in English.